Method and apparatus for N+1 packet level mesh protection

Details Method and apparatus for N+1 packet level mesh protection Method and apparatus for N+1 packet level mesh protection

2005-09-29

2009-11-24

Lamarre, Guy J (Department: 2112)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital data error correction

C714S756000, C714S784000

Reexamination Certificate

active

07624333

ABSTRACT:
Methods and apparatus are provided for N+1 packet level mesh protection. An error correction encoding method is provided that assembles M-T data packets; appends a sequence number and a payload integrity check to each of the M-T data packets; and creates T protection packets having the sequence number and payload integrity check, wherein a payload for each of the T protection packets are formed from corresponding symbols in the M-T data packets. An error correction decoding method is also provided that receives a plurality of error-free packets and one or more packets having an error; and reconstructs the one or more packets having an error by applying block erasure decoding to said plurality of error-free packets, whereby one packet having an error can be reconstructed for each protection packet used to encode the received packets.

REFERENCES:
patent: 5479416 (1995-12-01), Snodgrass et al.
patent: 6477185 (2002-11-01), Komi et al.
patent: 6487215 (2002-11-01), Watanabe et al.
patent: 7230935 (2007-06-01), Proctor et al.
patent: 2006/0109805 (2006-05-01), Malamal Vadakital et al.

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